package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;


    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误");
        }
        //3.符合，生成校验码
        String code = RandomUtil.randomNumbers(6);

        //4.保存验证码到session----redis
        // session.setAttribute("code",code);
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL,TimeUnit.MINUTES);


        //5.发送验证码
        log.debug("发送短信验证码成功，验证码："+ code);
        return Result.ok();

    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
//        //1.校验手机号
//        String phone = loginForm.getPhone();
//        if(RegexUtils.isPhoneInvalid(phone)){
//            return Result.fail("手机号格式错误");
//        }
//        //2.检验验证码
//        Object cacheCode = session.getAttribute("code");
//        String code = loginForm.getCode();
//        //3.不一致，直接报错
//        if(cacheCode == null || !cacheCode.toString().equals(code)){
//            Result.fail("验证码错误");
//        }
//        //4.一致，根据手机号查询用户 select * from tb_user where phone = ?
//        User user = query().eq("phone",phone).one();
//        //5.判断用户是否存在
//        if (user == null) {//user.null
//            //6.不存在，创建新用户并保存
//            user = createUserWithPhone(phone);
//        }
//        //7.保存用户信息到session中
//        session.setAttribute("user", BeanUtil.copyProperties(user,UserDTO.class));
//        return Result.ok();



        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if(cacheCode == null || !cacheCode.equals(code)){
            return Result.fail("验证码错误");
        }
        User user = query().eq("phone",phone).one();
        if (user == null) {
            user = createUserWithPhone(phone);
        }
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user,UserDTO.class);
        Map<String,Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL,TimeUnit.MINUTES);
        return Result.ok(token);


    }

    private User createUserWithPhone(String phone) {
        //1.创建用户
        User user  = new User();
        user.setPhone(phone);
        user.setNickName("USER_NICK_NAME_PREFIX"+RandomUtil.randomString(10));
        //2.保存用户
        save(user);
        return user;
    }
}
